Apparatus for producing nubbed yarns



Nov. 16, 1943. A. CAVEDON APPARATUS FOR PfiODUCING NUBBED YARNS Filed Sept. 50, 1940 2 Sheets-Sheet 1 flexa dlgkvedorz 2 M4 Nov. 16, 1943. A. CAVEDON 2,334,542

APPARATUS FOR PRODUCING NUBBED YARNS Filed Sept. 50, 1940 2 Sheets-Sheet 2 Jrzwrzforra; ZZeXarzder 6hr: an

- froma finishing card,

Patented Nov. 16, 1943 APmna rUs Fen PRoniioING Nansen YARNS a a "animation The brseht invention relates ta app'aiatus for" producing nubbed yarns-,i. arts havingn'ubs or store for terms material of dilf r'ent character or color 'incbr'iiofated in the 'yaiiis at regular intervals, as may B'e' desi'r'd;

aecsraihfg re we preseht m' errata, ms apes: rates for eraauc ag nubs is rdeateu adjaem to the dofir er a finishing earn, s as to are: liver the huesth the travemng tveb of carded fibres julst after it leaves tneubfier and before it is acted upon by the usual conden er -ior formation into separate yarns. Thus the nubs aspire onto thewb; become pressed into the same, and as the tees carded and rubbed into enters; the ri'ubs become incorporated 'pe'rina: neatly in the resalti 'gyarhs. V t

The apparatus f the pre's'ht'invention is pa fibula-fly charact'riied b'y'the fact that the feedin}; new for the nut material is sb s nchrb= ni'z 'i with th cutting in ans th'attneien'gths or the individual hubs can be closely controlled to give just the desired distribution or tiie'nubs when incorporated iii finished yarn. The above ann other adv ntageeus "features 'iifthe invention will hereinafter more fully appear from the follow ing description considered in connection with the accompanying drawings, in which- Fig. 1 is a view in side elevation of apparatus for delivering nubs to a travelling web, as defied Fig. 2' is a, viewin front elevation of a portion ofthe apparatus-shown i-n Fig; I is a r m n flr v w-ill strat n the operation of; the knife blades for cutting the uhs-me er a a some partsbeing in sc= 2; Each spam 3 Eiipiibit'd at its ends on blades 12 and .13 "are knife mechanism,- tne o'perati'oh "of is .adaetea tcI'cut: the nth ma:

' te'rial into snort nubs N, 558' Fig; 3-; which fail into a chute H for 'deliveryto the web 2; in a manner hereinnfteridescribed. a

The lowermost'of the; feed foils? isv mounted onh shaft 'I 5. carrying a za-tchet 1 6 beyond oneifra'me :men'iber. 5,..as' best'shown 152. The teeth of the ratchet ilijar adapted .to be engaged by '5, mm 1.1 piyota liysmounted at the end 6f asnce [8. adapted for-reciproeatorxmqye ment within med euideways. i9 providcd the fraine member is The slide 18 car-nes an ja'ctuator 20 extending downwardinto the path of movea mentFof a roll -21 carriedby a. crank arm 22 mounted 'onadrive shaft 23: a

The shaft '23 extendsbetweenthe -ir-a me membersi; ai'id i-s driven, from any suitable source of power, as bymeansof asprocketlhsee Fig. 2. The slide I78,iswieldably-nmintained in the retracted position pf Pig. 3 "by means oi a spring 25; with a fixed collar- 26 serving to limit the re; tra'ctive movement by engagementwith Qne jof thegifide's i9. The actua'tonszlextendsinto the path of movement of the rel-1:21 as, the shaft 13 rotates in the direction of the arrowjn; 1,

, sothat i ightehand movement, is, imparted to the slide-i8 totmn fth. ratchet. [6 through anangle corresponding to the, displacement -between a predetermined number of ratchet teeth for eaqh revolution of the drive shaft- The slide "[8 is shownat the end of its ratchet feed movement in it is fed by the rolls II, the cylinder I is intermittently driven in synchronism with the rolls" To this end, a shaft 29 carrying'the-cylim' der I0 is extended beyond one frame member 5,.

and carries a pulley 30 connected. by a belt 3I to. N

a pulley 32, turnable with a gear 33mounted on' a shaft 34 parallel to the feed roll Shaft. I5. The

gear 33 is in mesh with a gear 35 mounted on the shaft I5 adjacent the ratchet I6, so that the cylinder ll) is turned unison with the feedroll- II. ,The ratio between the pulleys 30 and .32 is suchthat the angle through which the cylinder-HID is turned; as measured on its periphery, can bemadeto substantially correspond to the lengthof nub material that is fedby the rolls II for each complete revolutionof the drive shaft 23." IL:

One knife blade I2v is stationary, withits edge substantially in alinement with theperipheries of the rolls II, while the other blade I3 is mounted on a bar 38 extending. between the frame members .5, and supported at its ends by parallel slides 31 mounted'for reciprocatoryrmovement in guides38 provided by. each frame member. Each slide 31 carries an actuator 39 extending upwardly into the path of movement of a roll 40 carried by a crank arm 4| mounted on the drive shaft 23. Each slide .31 isyieldably maintained in a position in which the knife bar 36 holds the blades open by means of a spring 42, a fixedcollar 43 serving to limit outward movement of the bar by'engagement with a guide 38. i

The angular relation between the crank arms 22 and H is such that while the roll his in engagement withthe actuator 20, to impart turn: ing movement to the feed rolls II, the knife bar 35 is maintained intheposition of Fig. 1. However, just after the roll' zl disengages the actuator 20 to permit retraction of the ratchet slide I8, the rolls 40"engage the actuators 39 to move the slides 31 inunis'onto the .positionof Fig. 3. This movement of theblades l2 and1l3 severs the lengths of nub material that have been previously fed between the open blades I2 and I3, whereupon the short nubs, designated N, fall upon the carded web 2, as indicated in dotted lines in Fig. 1. The feedrolls II are stationary when the cutting of the nub material occurs, after which the bar 36'returns to the position of Fig. 1, to open the knife blades as'the rolls 4B disengage the actuators 39. i

From the foregoin it is apparent'that during each complete revolution ofthe shaft 23,.starting from the position of Fig: lat .the'end. of the feeding stroke of the slide I8, the knife blades I2 and I3 will operate to sever the ends of nub material that have been previously fed into the opening of the chute l4 by the succeeding operation of the feed rolls II. The nubs N thus sev-v eredrwill fall through the chute and be delivered upon the surface of the moving web 2 of carded fibres, iii-advance of delivery of the web to the dividing rolls 4 of the condenser. These nubs N are pressed into the web, and as the web is divided and condensed into slivers, the nubs N become incorporated permanently in the resulting yarns. 2

After the movable knife blade I3 has been returned to the position of Fig.1 by the right-hand movement of the slides 31, following disengagement of the rolls 40 from the actuators 39, continued rotation of the shaft 23 will impart right- Chand' movement to the slide l8, to cause the pawl L I] to turn the feed rolls I I.

This movement is accompanied by turning of the drum ID by the belt 3|, so that all the ends of nub material N "are'fed apredetermined amount downwardly between the then open knife blades l2 and I3.

' Obviously, the above described cycle of operations willbe completed for each complete revolution;of the drive shaft 23. l

. As previously pointed out, the sleeve 21 carrying-the actuator 20, is adjustable longitudinally of the slide I8 so as to vary the stroke of the slide and thereby determine the number of ratchet teeth that are traversed by the pawl II upon each complete reciprocatory movement of the slide. In this way, the amount of nub material N fed by each operation'of the feed rolls, can be closely controlled to form nubs N of the desired,length. 4 1 I Inorder to providefor more uniform distribution and mixing of the nubs N on the web 2, the chute I4 may be provided with a distributing wheel 44 to rotate about a horizontal axis within the chute, as indicated in Fig. 4. The wheel 44 provides a series of vanes 45, which are adaptedto receive, the entire series of nubs N upon each operation of the'knife blades I2 and I3. The, wheel44 is adapted to be continuously driven, so thatithe action of the vanes 45 is to mix the nubs N, and to spread them evenly over the surface of the moving web 2, thereby obtaining a very, uniform distribution of the nubs in the finished yarns.

I claim:

Apparatus for-producing nubbed yarns, comprising in, combination, means for conveying a web ofcarded fibres from a carding machine to a condenser, a supply of nub material, feed rolls around which said material passes, a cutting device comprising relatively movable blades operable in a horizontal plane and normally open to permit the passage of said material therebetween, with the fixed blade having its edge in alinement with the peripheries of said feed rolls, a rotatably driven shaft, a ratcheting device driven from saidshaft toturn said rolls through a predetermined angle during'each complete revolution of said shaft to feed a predetermined length of said material between said open blades, and means driven from said shaft tomove said blades together in a horizontal plane and in the intervals between movement of said feed rolls to cutthe material that has been fed into nubs for deposit thereof uniformly across the full width of said web.

ALEXANDER CAVEDON. 

